2 Copyright (C) 2004 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_panner_h__
21 #define __ardour_panner_h__
27 #include <sigc++/signal.h>
29 #include <pbd/stateful.h>
30 #include <pbd/controllable.h>
32 #include <ardour/types.h>
33 #include <ardour/curve.h>
34 #include <ardour/automation_control.h>
46 class StreamPanner : public sigc::trackable, public PBD::Stateful
49 StreamPanner (Panner& p);
52 void set_muted (bool yn);
53 bool muted() const { return _muted; }
55 void set_position (float x, bool link_call = false);
56 void set_position (float x, float y, bool link_call = false);
57 void set_position (float x, float y, float z, bool link_call = false);
59 void get_position (float& xpos) const { xpos = x; }
60 void get_position (float& xpos, float& ypos) const { xpos = x; ypos = y; }
61 void get_position (float& xpos, float& ypos, float& zpos) const { xpos = x; ypos = y; zpos = z; }
63 void get_effective_position (float& xpos) const { xpos = effective_x; }
64 void get_effective_position (float& xpos, float& ypos) const { xpos = effective_x; ypos = effective_y; }
65 void get_effective_position (float& xpos, float& ypos, float& zpos) const { xpos = effective_x; ypos = effective_y; zpos = effective_z; }
67 /* the basic StreamPanner API */
69 virtual void distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes) = 0;
70 virtual void distribute_automated (AudioBuffer& src, BufferSet& obufs,
71 nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers) = 0;
73 boost::shared_ptr<AutomationControl> pan_control() { return _control; }
75 sigc::signal<void> Changed; /* for position */
76 sigc::signal<void> StateChanged; /* for mute */
78 int set_state (const XMLNode&);
79 virtual XMLNode& state (bool full_state) = 0;
81 Panner & get_parent() { return parent; }
83 /* old school automation loading */
85 virtual int load (istream&, string path, uint32_t&) = 0;
95 /* these are for automation. they store the last value
96 used by the most recent process() cycle.
105 struct PanControllable : public AutomationControl {
106 PanControllable (Session& s, std::string name, StreamPanner& p)
107 : AutomationControl (s, boost::shared_ptr<AutomationList>(new AutomationList(
108 ParamID(PanAutomation), 0.0, 1.0, 0.5)), name)
111 StreamPanner& panner;
113 void set_value (float);
114 float get_value (void) const;
115 bool can_send_feedback() const;
118 boost::shared_ptr<PanControllable> _control;
120 void add_state (XMLNode&);
121 virtual void update () = 0;
124 class BaseStereoPanner : public StreamPanner
127 BaseStereoPanner (Panner&);
128 ~BaseStereoPanner ();
130 /* this class just leaves the pan law itself to be defined
131 by the update(), distribute_automated()
132 methods. derived classes also need a factory method
133 and a type name. See EqualPowerStereoPanner as an example.
136 void distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
138 /* old school automation loading */
140 int load (istream&, string path, uint32_t&);
151 class EqualPowerStereoPanner : public BaseStereoPanner
154 EqualPowerStereoPanner (Panner&);
155 ~EqualPowerStereoPanner ();
157 void distribute_automated (AudioBuffer& src, BufferSet& obufs,
158 nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers);
160 void get_current_coefficients (pan_t*) const;
161 void get_desired_coefficients (pan_t*) const;
163 static StreamPanner* factory (Panner&);
166 XMLNode& state (bool full_state);
167 XMLNode& get_state (void);
168 int set_state (const XMLNode&);
174 class Multi2dPanner : public StreamPanner
177 Multi2dPanner (Panner& parent);
180 void distribute (AudioBuffer& src, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes);
181 void distribute_automated (AudioBuffer& src, BufferSet& obufs,
182 nframes_t start, nframes_t end, nframes_t nframes, pan_t** buffers);
184 static StreamPanner* factory (Panner&);
187 XMLNode& state (bool full_state);
188 XMLNode& get_state (void);
189 int set_state (const XMLNode&);
191 /* old school automation loading */
193 int load (istream&, string path, uint32_t&);
199 class Panner : public std::vector<StreamPanner*>, public PBD::Stateful, public sigc::trackable
208 Output (float xp, float yp)
209 : x (xp), y (yp), current_pan (0.0f), desired_pan (0.f) {}
213 Panner (string name, Session&);
216 /// The fundamental Panner function
217 void distribute(BufferSet& src, BufferSet& dest, nframes_t start_frame, nframes_t end_frames, nframes_t nframes, nframes_t offset);
219 bool bypassed() const { return _bypassed; }
220 void set_bypassed (bool yn);
222 StreamPanner* add ();
223 void remove (uint32_t which);
225 void reset (uint32_t noutputs, uint32_t npans);
227 void snapshot (nframes_t now);
228 void transport_stopped (nframes_t frame);
230 void clear_automation ();
232 void set_automation_state (AutoState);
233 AutoState automation_state() const;
234 void set_automation_style (AutoStyle);
235 AutoStyle automation_style() const;
236 bool touching() const;
238 XMLNode& get_state (void);
239 XMLNode& state (bool full);
240 int set_state (const XMLNode&);
242 sigc::signal<void> Changed;
244 static bool equivalent (pan_t a, pan_t b) {
245 return fabsf (a - b) < 0.002; // about 1 degree of arc for a stereo panner
248 void move_output (uint32_t, float x, float y);
249 uint32_t nouts() const { return outputs.size(); }
250 Output& output (uint32_t n) { return outputs[n]; }
252 std::vector<Output> outputs;
253 Session& session() const { return _session; }
260 LinkDirection link_direction() const { return _link_direction; }
261 void set_link_direction (LinkDirection);
263 bool linked() const { return _linked; }
264 void set_linked (bool yn);
266 sigc::signal<void> LinkStateChanged;
267 sigc::signal<void> StateChanged; /* for bypass */
269 /* only StreamPanner should call these */
271 void set_position (float x, StreamPanner& orig);
272 void set_position (float x, float y, StreamPanner& orig);
273 void set_position (float x, float y, float z, StreamPanner& orig);
275 /* old school automation */
280 void distribute_no_automation(BufferSet& src, BufferSet& dest, nframes_t nframes, nframes_t offset, gain_t gain_coeff);
283 uint32_t current_outs;
286 LinkDirection _link_direction;
288 static float current_automation_version_number;
290 /* old school automation handling */
292 std::string automation_path;
293 void set_name (std::string);
296 } // namespace ARDOUR
298 #endif /*__ardour_panner_h__ */